1 files changed, 78 insertions, 0 deletions
diff --git a/prge_draw.c b/prge_draw.c
new file mode 100644
index 0000000..4228d68
--- /dev/null
+++ b/prge_draw.c
@@ -0,0 +1,78 @@
+void clear_window(PRGEWindow wnd, V3 clear_color)
+{
+	glClearColor(clear_color.x, clear_color.y, clear_color.z, 1.0f);
+	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
+}
+
+void begin3d(PRGEWindow wnd, Shader shader, Camera camera)
+{
+	F32	ar;
+	MAT4	proj, view;
+
+	ar = (F32)wnd.w/(F32)wnd.h;
+	proj = camera_persp(camera, ar);
+	view = getfpviewmat(&camera);
+
+	glUseProgram(shader.id);
+
+	setmat4fv(shader.id, PRGE_SHADER_PROJ_MAT, proj);
+	setmat4fv(shader.id, PRGE_SHADER_VIEW_MAT, view);
+}
+
+void end3d(void)
+{
+	glUseProgram(0);
+}
+
+void begin3d_alpha(PRGEWindow wnd, Shader shader, Camera camera)
+{
+	glEnable(GL_BLEND);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+	begin3d(wnd, shader, camera);
+}
+
+void end3d_alpha(void)
+{
+	end3d();
+	glDisable(GL_BLEND);
+}
+
+void draw_mesh(Mesh mesh)
+{
+	S32	i;
+
+	ASSERT(mesh.vao);
+
+	glBindVertexArray(mesh.vao);
+
+	for (i = 0; i < mesh.ntextures; i++) {
+		glActiveTexture(GL_TEXTURE0+i);
+		glBindTexture(GL_TEXTURE_2D, mesh.textures[i].id);
+	}
+
+	if (mesh.ebo)
+		glDrawElements(GL_TRIANGLES, mesh.nindices, GL_UNSIGNED_INT, 0);
+	else
+		glDrawArrays(GL_TRIANGLES, 0, mesh.nverts);
+
+	glBindVertexArray(0);
+} 
+
+void draw_model(Shader shader, Model model)
+{
+	MAT4	modelm,
+		meshm,
+		resm;
+	S32	i;
+
+	modelm = rotatemat4(MAT4_IDENTITY, model.rotate);
+	modelm = translmat4(modelm, model.origin);
+	for (i = 0; i < model.nmeshes; i++) {
+		meshm = rotatemat4(MAT4_IDENTITY, model.meshes[i].rotate);
+		meshm = translmat4(meshm, model.meshes[i].origin);
+		resm = mulmat4(modelm, meshm);
+
+		setmat4fv(shader.id, PRGE_SHADER_MODEL_MAT, resm);
+		draw_mesh(model.meshes[i]);
+	}
+}